Graduate Thesis Or Dissertation
 

Taxonomy of Phacelia section Miltitzia (hydrophyllaceae)

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  • A systematic study was made of the species comprising Phacelia section Miltitzia. These species, which are commonly found in the Great Basin physiographic province of western North America, are distinguished from other members of Phacelia by their yellow, marcescent corollas and their transversely corrugated seeds. This project utilized morphological, cytological, distributional, and palynological comparisons, and a study of the reproductive biology of the species in section Miltitzia. Over 600 specimens were studied from 20 herbaria in the United States. An artificial key to the nine species and two varieties of section Miltitzia is presented in the taxonomic treatment along with complete synonymies, descriptions, lists of representative specimens, and distribution maps. One new species, Phacelia monoensis, is described and an existing taxon, Phacelia submutica, is reduced to varietal status under Phacelia scopulina.
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